The Executive Approval Project would not have been possible without the generosity of those people and organizations listed below. If you would like to contribute data, please contact us (executiveapproval@gmail.com, subject: data contributions).

DATA CONTRIBUTORS

Christopher Anderson

Sveinung Arensen

Penny Apostolopoulou

Moisés Arce

Paolo Bellucci

Sergio Berenzstein

Taylor Boas

Barry Burden

Ernesto Calvo

Daniela Campello

Julio Carrión

Centro Nacional de Consultoria

Svitlana Chernykh

Javier Corrales

Ruth Dassonneville

Datum Internacional

Pablo Fernandez-Vazquez

Gallup Korea

Francois Gélineau

Wladimir Gramacho

Kirk Hawkins

Allen Hicken

Indridi Indriason

Irish Opinion Poll Archive

Gregg Johnson

Spyros Kosmidis

Sylvia Kritzinger

Brian Lai

Carlos Lemoine

Michael Lewis-Beck

Pedro Magalhães

Beatriz Magaloni

Michael Marsh

Andrés Masi Rius

Mikko Mattila

Ian McAllister

Andrés Mejía Acosta

Vincenzo Memoli

Metron Analysis

Jana Morgan

Wolfgang C. Müller

Spyridoula Nezi

Norwegian Citizen Panel

Observatorio Electoral of Universidad Diego Portales

Aníbal Pérez-Liñán

Andrew Roberts

Vidal Romero

Saskia Ruth

Matthew Singer

Leslie Schwindt-Bayer

Social Weather Stations

James Stimson

Urpi Torrado

Daniel Treisman

Luis Daniel Vázquez Valencia

Laron Williams

Cesar Zucco

RESEARCH SUPPORTERS

Stephanie Allred

Johanna Andrango

Aries Arugay

Thomas Breideband

Tyra Bouhamdan

Sean Bullock

Elizabeth Duffield

Nahari Faria Terena

Nagireddy Gatla

Madison Hanberry

Alin Horj

Katherine Hunt

Jack Le

Myung Gyun Lim

Thays Martins

Nimendra Mawalagedara

Luigi Mendez

Tim Model

Thiago Nascimento

Jacqueline Obiero

Sarah Shair-Rosenfield

Alissandra Stoyan

Inés Valdez

Harry Young

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